Yeah I thought about its just too expensive, it's cheaper to just buy metal frame. :/

So I just made my wooden frame for my GPUs,  but then I searched on  GPU fire Hazard, and I saw a lot of people  writing about fire hazard and wooden frame,  I just want to know if I should just throw it out of the window and  buy a metal frame,  I only have two GPUs for now,  and one of them is running on the  motherboard because it makes the computer faster,  so it's only one riser,  in the future I want to have  6 GPUs,  but it will take me almost a half of year to get the money  for that.
I've taken some pictures of my  wooden frame,  please let me know what you think about it and how big   the fire hazards is,  because if it's too big I will throw it out off the window.